Pull ARC updates from Vineet Gupta:
"Sorry for the late pull request. Current stuff was ready for a while
but I was hoping to squeeze in support for almost ready ARC SDP
platform (and avoid a 2nd pull request), however it seems there are
still some loose ends which warrant more time.
- Platform code reduction/moving-up (TB10X no longer needs any
callbacks)
- updated boot printing
- kgdb update for arc gdb 7.5
- bug fixes (some marked for stable)
- more code refactoring/consolidation"
* tag 'arc-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: boot: cpu feature print enhancements
ARC: boot: consolidate cross-checking of h/w and s/w
ARC: unbork FPU save/restore
ARC: remove extraneous __KERNEL__ guards
ARC: Update order of registers in KGDB to match GDB 7.5
ARC: Remove unneeded Kconfig entry NO_DMA
ARC: BUG() dumps stack after @msg (@msg now same as in generic BUG))
ARC: refactoring: reduce the scope of some local vars
ARC: remove gcc mpy heuristics
ARC: RIP @running_on_hw
ARC: Update comments about uncached address space
ARC: rename kconfig option for unaligned emulation
ARC: [nsimosci] Allow "headless" models to boot
ARC: [arcfpga] Get rid of ARC_BOARD_ANGEL4 and ARC_BOARD_ML509
ARC: [arcfpga] Remove more dead code
ARC: [plat*] move code out of .init_machine into common
ARC: [arcfpga] consolidate machine description, DT
ARC: Allow SMP kernel to build/boot on UP-only infrastructure
Pull arch atomic cleanups from Ingo Molnar:
"This is a series kept separate from the main locking tree, which
cleans up and improves various details in the atomics type handling:
- Remove the unused atomic_or_long() method
- Consolidate and compress atomic ops implementations between
architectures, to reduce linecount and to make it easier to add new
ops.
- Rewrite generic atomic support to only require cmpxchg() from an
architecture - generate all other methods from that"
* 'locking-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read()
locking, mips: Fix atomics
locking, sparc64: Fix atomics
locking,arch: Rewrite generic atomic support
locking,arch,xtensa: Fold atomic_ops
locking,arch,sparc: Fold atomic_ops
locking,arch,sh: Fold atomic_ops
locking,arch,powerpc: Fold atomic_ops
locking,arch,parisc: Fold atomic_ops
locking,arch,mn10300: Fold atomic_ops
locking,arch,mips: Fold atomic_ops
locking,arch,metag: Fold atomic_ops
locking,arch,m68k: Fold atomic_ops
locking,arch,m32r: Fold atomic_ops
locking,arch,ia64: Fold atomic_ops
locking,arch,hexagon: Fold atomic_ops
locking,arch,cris: Fold atomic_ops
locking,arch,avr32: Fold atomic_ops
locking,arch,arm64: Fold atomic_ops
locking,arch,arm: Fold atomic_ops
...
Order of registers has changed in GDB moving from 6.8 to 7.5. This patch
updates KGDB to work properly with GDB 7.5, though makes it incompatible
with 6.8.
Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: <stable@vger.kernel.org> #3.10, 3.12, 3.14, 3.16
ARC specific version (doesn't panic) still makes sense so that generic
code calling BUG doesn't panic and helps debugging more
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
* No active users of this flag anymore
* flag itself was no longer usable with new simualtor which acts just like
hardware, not providing the special chip-id = 0xffff which good old
ISS used to do.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
In light of recent SNAFU with SMP build, allow simple platform to build
as SMP but run UP.
* Remove the dependence on simulation SMP extension to enable quick
build/test iterations of SMP kernel.
* In absence of platform SMP registration, prevent the NULL smp feature
name from borkign the system
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
The nohz full code needs irq work to trigger its own interrupt so that
the subsystem can work even when the tick is stopped.
Lets introduce arch_irq_work_has_interrupt() that archs can override to
tell about their support for this ability.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Pull ARC changes from Vineet Gupta:
"Mostly cleanup/refactoring in core intc, cache flush, IPI send..."
* tag 'arc-v3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
mm, arc: remove obsolete pagefault oom killer comment
ARC: help gcc elide icache helper for !SMP
ARC: move common ops for line/full cache into helpers
ARC: cache boot reporting updates
ARC: [intc] mask/unmask can be hidden again
ARC: [plat-arcfpga] No need for init_irq hack
ARC: [intc] don't mask all IRQ by default
ARC: prune extra header includes from smp.c
ARC: update some comments
ARC: [SMP] unify cpu private IRQ requests (TIMER/IPI)
* print aliasing or not, VIPT/PIPT etc
* compress param storage using bitfields
* more use of IS_ENABLED to de-uglify code
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
The current cpu-private IRQ registration is ugly as it requires need to
expose arch_unmask_irq() outside of intc code.
So switch to percpu IRQ APIs:
-request_percpu_irq [boot core]
-enable_percpu_irq [all cores]
Encapsulated in helper arc_request_percpu_irq()
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This patch adds implementation of GET_THREAD_AREA ptrace request type. This
is required by GDB to debug NPTL applications.
Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
There's no Kconfig symbol ARC_MMU_V4 so the checks for CONFIG_ARC_MMU_V4
will always evaluate to false. Remove them.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Pull ARC updates from Vineet Gupta:
"Nothing too exciting here, just minor fixes/cleanup. Only noteworthy
ones are:
- Moving cache disabling to early boot
- ARC UART enabled only if earlyprintk setup in cmdline"
* tag 'arc-v3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: Disable caches in early boot if so configured
ARC: [arcfpga] Early ARC UART to be only activated by cmdline
ARC: [arcfpga] Get rid of legacy BVCI latency unit support
ARC: remove duplicate header exports
ARC: arc_local_timer_setup() need not pass own cpu id
ARC: Fixed spelling errors within comments
ARC: make start_thread() out-of-line
ARC: fix mmuv2 warning
ARC: [SMP] ISS SMP extension bitrot
Pull DeviceTree updates from Rob Herring:
- Another round of clean-up of FDT related code in architecture code.
This removes knowledge of internal FDT details from most
architectures except powerpc.
- Conversion of kernel's custom FDT parsing code to use libfdt.
- DT based initialization for generic serial earlycon. The
introduction of generic serial earlycon support went in through the
tty tree.
- Improve the platform device naming for DT probed devices to ensure
unique naming and use parent names instead of a global index.
- Fix a race condition in of_update_property.
- Unify the various linker section OF match tables and fix several
function prototype errors.
- Update platform_get_irq_byname to work in deferred probe cases.
- 2 binding doc updates
* tag 'devicetree-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (58 commits)
of: handle NULL node in next_child iterators
of/irq: provide more wrappers for !CONFIG_OF
devicetree: bindings: Document micrel vendor prefix
dt: bindings: dwc2: fix required value for the phy-names property
of_pci_irq: kill useless variable in of_irq_parse_pci()
of/irq: do irq resolution in platform_get_irq_byname()
of: Add a testcase for of_find_node_by_path()
of: Make of_find_node_by_path() handle /aliases
of: Create unlocked version of for_each_child_of_node()
lib: add glibc style strchrnul() variant
of: Handle memory@0 node on PPC32 only
pci/of: Remove dead code
of: fix race between search and remove in of_update_property()
of: Use NULL for pointers
of: Stop naming platform_device using dcr address
of: Ensure unique names without sacrificing determinism
tty/serial: pl011: add DT based earlycon support
of/fdt: add FDT serial scanning for earlycon
of/fdt: add FDT address translation support
serial: earlycon: add DT support
...
